while I trigger the backup am getting below error and checked lib file link look fine
kernel release 720
patch 17
RMAN>
host command complete
RMAN> 2> 3> 4> 5> 6> 7> 8> 9> 10> 11>
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of allocate command on sbt_1 channel at 02/27/2014 08:56:25
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA-27211: Failed to load Media Management Library
Additional information: 2
RMAN>
specification does not match any backup in the repository
RMAN>